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Screw loosening, breaking on PITT-EASY Implants?

Last Updated: Jun 03, 2015

These 3.25x10mm PITT-EASY implants [Sybron] were installed in 2008. They were restored in 2009 with stock cementable abutments, torqued to 25n/cm.

In 2015 the patient presented with the crown, still cemented to the abutment, in hand. After heat separating the parts, I reassembled them on the implant and torqued to 25n/cm. On 03.24.2015 the screw broke, presumably from the heat treatment. The crown and abutment were again heat separated, and a new screw used to reassemble the parts. On 05.19.2015 the patient called to say the crown had unscrewed itself again.

When removing the broken screw from inside the implant, my impression was that the threads within the implant held the screw only loosely. No rotary instruments were used to remove the screw, as it came out by picking at it counterclockwise until it came out. My best guess is that the threads in the implant will no longer grasp the screw, but I wanted to see if anyone has had the same issue. Thoughts? Thanks

![]Pitt-Easy-01.18.2010](https://osseonews.nyc3.cdn.digitaloceanspaces.com/wp-content/uploads/2015/06/Pitt-Easy-01.18.2010-e1433340879297.jpg)Pitt-Easy-01.18.2010

3 Comments on Screw loosening, breaking on PITT-EASY Implants?

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Edw. Carroll

6/9/2015

The Pitt Easy abutments should be torqued to 32Ncm. Contact Keystone Dental (new US Distributor) to purchase new screws. Phone 866-902-9272.

Hosein Akhavizadegan

6/9/2015

Hi . 1- one of the most reason of abutment screw loosening and fracture is overloading . Posterior occlusal contacts must be established by implants . 2.occlusal adjustment in MIC and eccentric movements should be precisely done. 3. Examine the abutment in the fixture analogue and try to rotate it .if rotation happen , hex may be deformed and need to change the abutment . 4 .use new abutment screw and follow the manufacture's recommendation torque . 5 . 15 minutes after torque it , Retorque . 6 . It's advisable to change the restoration to screw-retained restoration in such case because of ease of access to screw . 7 . The patient must be examined to any sign of bruxing events and need to night guard. If the main reason is occlusal overload and it's not treated the more serious outcomes ( bone loss , fixture fx) may be appear .

Dan

6/15/2015

Thanks for the help! Dan

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